The UN projects that sub-Saharan Africa will increase its population by roughly 1.4 billion people over the next 5o years. Noah Millman doubts this is possible:
The growth in the sub-Saharan African population is projected to be larger than the entire population of China. The population of Europe is expected to barely change over the period, going from 738 million in 2010 to 702 million in 2060. The population of northern America – the United States and Canada – is expected to grow from 345 million to 466 million. Put together, Europe and Northern America go from 1.08 billion to 1.17 billion. Again, the increase in the the sub-Saharan African population is projected to be larger than this entire region.
The Dish 